Olivia, Walter and Peter are called in to investigate the death of a car salesman who was found in a pool of « goo, » exactly like another man across the country. When Walter discovers that the « goo » is brain matter, the trio tries to figure out how the killer can liquefy human brains. As the deaths pile up, the investigation reveals a common thread linking the victims together in an unthinkable manner. Meanwhile, Olivia is horrified when the case places a loved one in harm’s way